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arXiv 2103.15645math.AP
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无穷远处解的性质通过倒置研究混合边界值问题

Behaviour at infinity for solutions of a mixed boundary value problem via inversion

Linköping University(林雪平大学);Busitema University(布西特马大学)

Jana Björn, Abubakar Mwasa

AI总结:

研究混合边界值问题的解在无穷远处的行为,证明了解的存在性和唯一性,并通过电容性描述无穷远处的正则性。

摘要:

我们研究了在开放的无限圆柱半圆柱中,拟线性椭圆方程divA(x,∇u(x))=0的混合边界值问题,其中部分边界上有连续Dirichlet数据,其余边界上有零共正规导数。我们证明了混合问题的有界弱解的存在性和唯一性,并通过p-电容性描述无穷远处的正则性。对于仅在无穷远处有Neumann数据的解,我们证明它们在三种可能的行为中恰好有一种,类似于Phragmén--Lindelöf原理中的替代情况。

英文摘要:

We study a mixed boundary value problem for the quasilinear elliptic equation $\mathop{\rm div}\mathcal{A}(x,\nabla u(x))=0$ in an open infinite circular half-cylinder with prescribed continuous Dirichlet data on a part of the boundary and zero conormal derivative on the rest. We prove the existence and uniqueness of bounded weak solutions to the mixed problem and characterize the regularity of the point at infinity in terms of \p-capacities. For solutions with only Neumann data near the point at infinity we show that they behave in exactly one of three possible ways, similar to the alternatives in the Phragmén--Lindelöf principle.

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